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NDT.net Issue - 2017-03 - NEWS

Sonotron NDT provides the PA UT based solution for the rapid detection of the fatigue cracks in the actuators of the leading edge flaps


Sonotron NDT67, Rehovot, Israel
 
NDT.net Journal
Issue: 2017-03
The wings of the modern aircraft are equipped with the leading edge flaps, which are advanced during takeoff and landing for increasing the lift. The compound differential planetary gearing is used in the leading edge flaps mechanics when it is necessary to provide high-torque low-speed power transmission connecting the flap surface to the spar. It was realized that the fatigue cracks may occur in the certain areas of the ring gear in between the teeth propagating towards the OD surface. In order to prevent the accident such cracks should be detected at the earliest possible stage.

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The while-on-wing rapid detection of the small cracks of the ring gear is now possible with use of the PA modality based technology from Sonotron NDT.  

The inspection is illustrated by the video below: whilst scanning with the small PA probe circumferentially over the OD surface of the ring gear the direct reflection echoes received from the teeth appear one-by-one on the True-To-Geometry sectorial scan image. The tip-diffraction echoes from the cracks are easy distinguishable appearing is the separately designated region of interest.

The inspection may be implemented with the use of Sonotron NDT’s ISONIC 3510, ISONIC 2010, ISONIC 2009 portable ultrasonic flaw detectors.

The related links:

Sonotron NDT

More of Sonotron NDT published in NDT.net
2019-06-01: Air-to-Soil Interface: Rapid Screening and Mapping of Corrosion Damages in the Steel Pole Legs beneath the Soil Level
2019-04-01: PAUT: Inspection of complex geometry fracture critical parts – manual probe manipulation
2019-03-01: PAUT: Corrosion detection/survey under shell/tank bottom repairs using lap-welded patch plates
2019-02-01: PAUT: In-Service Corrosion Survey of Critical Zone in the Annular Rings in the Above Ground Storage Tanks
2018-11-01: Toggling between S-Scan and FMC/TFM coverage whilst inspecting simple and complex geometry welds and other structural elements
2018-11-01: PAUT and Conventional Modality for the Materials Characterization using Frequency Domain Signal Presentation (FFT)
2018-10-01: Short Range Guided Wave Inspection – Annular Rings with Narrow Outer Chime
2018-09-01: MULTIGROUP T – the new inspection modality combining live S-Scan and FMC/TFM coverage out of the same PA Probe
2018-08-01: Complete PAUT Solution for the In-Service Inspection of Annular Ring Plates in the Above Ground Storage Tanks
2018-07-01: Sonotron NDT Brings the Annual Verification (Calibration) of PAUT Instruments to the Overnight Automatic Procedure at the Premises of the Instrument Owners
All 67 Articles & News of Sonotron NDT in NDT.net

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